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 | 1987 | |
|---|---|---|
| 2 |      | Aarni Perko: Externasl Labeling and Algorithms for Hierarchic Networks. WG 1987: 162-170 |
| 1983 | ||
| 1 |  | Aarni Perko: A Representation of Disjoint Sets with Fast Initialization. Inf. Process. Lett. 16(1): 21 (1983) |